<!DOCTYPE NETSCAPE-Bookmark-file-1>
<HTML>
<HEAD>
<TITLE>Bookmarks</TITLE>
</HEAD>
<BODY>
<H1>Bookmarks</H1>
<DL><p>
    <!-- Valid bookmark -->
    <DT><A HREF="https://duckduckgo.com" ADD_DATE="1234567890">DuckDuckGo</A>
    
    <!-- Invalid bookmark - missing HREF -->
    <DT><A ADD_DATE="1234567891">Invalid - No URL</A>
    
    <!-- Valid bookmark -->
    <DT><A HREF="https://github.com" ADD_DATE="1234567892">GitHub</A>
    
    <!-- Invalid bookmark - malformed HREF -->
    <DT><A HREF="" ADD_DATE="1234567893">Invalid - Empty URL</A>
    
    <!-- Invalid bookmark - not a valid URL -->
    <DT><A HREF="not-a-valid-url" ADD_DATE="1234567894">Invalid - Malformed URL</A>
    
    <!-- Valid bookmark -->
    <DT><A HREF="https://example.com" ADD_DATE="1234567895">Example Site</A>
    
    <!-- Invalid bookmark - broken HTML -->
    <DT><A HREF="https://broken.com" ADD_DATE="1234567896">Broken HTML
    
    <!-- Valid bookmark -->
    <DT><A HREF="https://stackoverflow.com" ADD_DATE="1234567897">Stack Overflow</A>
    
    <!-- Invalid bookmark - missing closing tag -->
    <DT><A HREF="https://incomplete.com" ADD_DATE="1234567898">Incomplete
    
    <!-- Valid folder with mixed content -->
    <DT><H3 ADD_DATE="1234567899" LAST_MODIFIED="1234567900">Mixed Folder</H3>
    <DL><p>
        <!-- Valid bookmark in folder -->
        <DT><A HREF="https://valid-in-folder.com" ADD_DATE="1234567901">Valid in Folder</A>
        
        <!-- Invalid bookmark in folder - javascript URL (security risk) -->
        <DT><A HREF="javascript:alert('xss')" ADD_DATE="1234567902">Invalid - JavaScript URL</A>
        
        <!-- Valid bookmark in folder -->
        <DT><A HREF="https://another-valid.com" ADD_DATE="1234567903">Another Valid</A>
    </DL><p>
    
    <!-- Valid bookmark -->
    <DT><A HREF="https://final-valid.com" ADD_DATE="1234567904">Final Valid</A>
</DL><p>
</BODY>
</HTML>